let Event = require('./index')


let event3 = function(){
    console.log('点击事件3')
}
Event.once('click', event3)
Event.on('click', function(){
    console.log('点击事件4')
})
Event.on('click', function(){
    console.log('点击事件5')
})


Event.emit('click')

Event.emit('click')

